Chuck.



W. L. MILLER.

CHUCK.

APPLICATION FILED FEB. 21, 1911.

Patented Oct. 31, 191-1.

COLUMBIA PLANuuRAPH 60., WASHINGTON. I)v c UNITED STATES PATENT OFFICE.

WILLIAM L. MILLER, OF MADISON, WISCONSIN, ASSIGNOR TO GrISHOLT MACHINECOM- 7 PANY, 0F MADISON, WISCONSIN, A CORPORATION OF WISCONSIN.

CHUCK.

Specification of Letters Patent.

Patented Oct. 31, 1911.

Application filed February 21, 1911. Serial No. 610,077.

To all whom it may concern;

Be it known that I, VVILLIAM L. MILLER, a citizen of the United States,residing at Madison, in the county of Dane and State of lVisconsin, haveinvented certain new and useful Improvements in Chucks, of which thefollowing is a specification.

This invention relates to chucks such as are used in lathes, boringmachines, and other similar machines employing a workholder; and theinvention resides in a novel means for rendering the chuck dust-proof.

In that type of chucks known as scroll chucks a serious difficultyheretofore encountered has resulted from the tendency of dust to workinto the teeth of the cooperating scrolls on the scroll plate and innersides of the chuck-jaws, producing clogging and sticking and renderingadjustment difficult. As a remedy for this diliicult-y my inventionresides in the provision of a dust-proof wiper or wipers, preferably offelt, located between either or both of the inner and outer ends of thejaws and the bases of the grooves or channels in which they slide; andin the preferred construction these wipers are so secured that the jawsmay be taken on and off the chuck-body without disturbing the wipers ordetaching them from the parts to which they are secured.

The invention will be readily understood when considered in connectionwith the accompanying drawings in which- Figure 1 is a face view of thechuck, partly broken out to show the chuck scroll; and

Fig. 2 is a broken sectional view substantially on the lines wm and l ofFig. 1, with the chuck appearing partly in side elevat-ion.

Referring to the drawing, 5 designates the chuck-spindle, 6 the backplate, and 7 the chuck-body, which parts are securely united by thescrews 8. Between the back plate 6 and chuck-body 7 is mounted the usualscroll 9 driven by pinions 10 journaled in the periphery of the backplate and chuck-body and meshing with a bevel gear 11 on the back of thescroll 9; the shafts of the pinions 10 being provided with wrench-holds12 for the insertion of a suitable tool for turning the pinions. Thechuck-body 7 is provided in its outer face with the usual tonguedchannels 13 adapted to receive the chuck-jaws.

The parts as thus far described are standard construction and wellunderstood by those skilled in the art.

Slidably mounted in the channels 13 are two-part chuck-jaws eachcomprising a jaw base 14 and a j aw proper 15. The inner face of eachjaw base 14 is provided with teeth 16 which engage the teeth 17 of thescroll 9 in the usual way. Screwed to the base of the channel 13 at itsinner end by a screw 18 is a felt wiper 19, the outer surface of whichengages the inner end port-ion of the base of the jaw base 14; andsimilarly secured by a screw 20 to the outer end portion of the jaw base14 is another felt wiper 21, the outer face of which slidingly engagesthe outer end of the base of the channel 13. These wipers 19 and 21guard the cooperating teeth of the jaws and scroll at both ends of thejaws against the entrance of dustwhich has heretofore proved a seriousannoyance in machines of this character. It will be observed that bysecuring the inner wiper to the base of the channel and the outer wiperto the base of the jaw, the jaw can be withdrawn and replaced withoutthe necessity of removing the wipers from the parts to which they arerespectively attached. Mounted on the outer face of the jaw base 14 by alongitudinal tongue-and-groove joint 14 is the jaw proper 15, the latterbeing adjustable to several positions on the jaw base (herein shown asthree in number) by means of a cross-tongue 22 on the underside of thejaw member 15 which may engage any one of three cross-grooves 23, 24,and 25 in the outer face of the jaw base 14, and being secured inadjusted position by screws 26 and 27 passed through the jaw member 15and threaded into two of a series of tapped holes 28, 29, 30, 31, and 32formed at suitable points to accommodate the screws 26 and 27 in theouter face of the jaw base.

I have herein shown the chuck-head as provided with four jaws, but itwill ,be understood that my invention'is applicable to a chuck having agreater or less number of jaws, the particular number of the latterbeing entirely immaterial.

I claim- 1. Ina chuck, the combination with a chuck-body radiallychanneled to receive a chuck-j aw, and a scroll rotatably mounted insaid chuck-body, of a chuck-jaw slidably mounted in said channel andhaving teeth engaging said scroll, and a wiper located between the innerend portions of the base of the jaw and the base of the channel,substantially as described.

2. In a chuck, the combination with a chuck-body radially channeled toreceive a chuck-j aw, and a scroll rotatably mounted in said chuck-body,of a chuck-jaw, slidably mounted in said channel and having teethengaging said scroll, and a wiper located between the inner end portionsof the base of the jaw and the base of the channel and secured to thelatter, substantially as described.

3. In a chuck, the combination with a chuck-body radially channeled toreceive a chuck-jaw, and a scroll rotatably mounted in said. chuck-body,of a chuck-jaw slidably mounted in said channel and having teethengaging said scroll, and a wiper located between the outer end portionsof the base of the jaw and the base of the channel, substantially asdescribed.

4. In' a chuck, the combination with a chuck-body radially channeled toreceive a chuck-j aw, and a scroll rotatably mounted in said chuck-body,of a chuck-jaw slidably mounted in said channel and having teethengaging said scroll, and a wiper located between the outer end portionsof the base of the channel and the base of the jaw and secured t0 thelatter, substantially as described.

5. In a chuck, the combination with a chuck-body radially channeled toreceive a chuck-jaw, and a scroll rotatably mounted in said chuck-body,0]": a chuck-jaw slidably mounted in said channel and having teethengaging said scroll, and wipers located be tween the base of thechannel and the base of the jaw at their inner and outer ends,respectively, substantially as described.

6. In a chuck, the combination with a chuck-body radially channeled toreceive a chuck-j aw, and a scroll rotatably mounted in said chuck-body,of a chuck-jaw slidably mounted in said channel and having teethengaging said scroll, and wipers secured respectively to the inner endof the base of the channel and the outer end of the base of the jaw,substantially as described.

IVILLIAM L. MILLER.

Vitnesses D. H. WRIGHT, M. E. GAEoKs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

